I've had 2 rifles, a Ruger and a Winchester with a Shaw barrel and could not get either to shoot 120 or 117 bullets. They are 10 twist if I recall correctly. 100gr Pro-hunters are my go-to bullet with IMR-4350 or (the best) H-4831 SC when loading hunting rounds.
87 grain bullets have been the most accurate. I like Nosler or Sierra.